I have a friend who likes to call the internal combustion device that powers our cars as 'motors' and it's getting pretty annoying.

Quote Originally Posted by Wikipedia
An engine is a mechanical device that produces some form of output from a given input. When the purpose of an engine is to produce mechanical power from a fuel source it is referred to as a prime mover; alternatively, a motor is a device which produces mechanical power from other forms of energy (such as electricity, a flow of hydraulic fluid, or compressed air). An automobile makes use of several motors to start the car and drive the car's various pumps (fuel, power steering, etc) – but the power plant that propels the car is called an engine.
Everytime we get on the subject of engines I try to drop hints by using the correct word but he doesn't seem to get it.

And OCD is a bitch.